<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<h3>登录</h3>
      <hr>
      <form action="FirstServlet" method="post">
                用户名：<input type="text" name="username"/><br>
                 密码:<input type="password" name="password"/><br>
              <input type="submit" />
      </form>
</body>
</html>